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I have an M1078 military cargo truck with a CAT 3126, the
I have an M1078 military cargo truck with a CAT 3126, the engine starts fine and runs for 10 to 30 seconds and then shuts down. If I can catch it while it is starting to die, I can pump the throttle a… read more
Curtis B.
Curtis B.
Technician
Associate Degree
991 satisfied customers
Marine 3126B and when running at 2500+ For 5-10 minutes it
Marine 3126B and when running at 2500+ For 5-10 minutes it blows the gasket on the secondary fuel filter. No issues at a lower rpm. Could it be just a bad filter?… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I am researching the reliability of a CAT 3126 engine. I
I am researching the reliability of a CAT 3126 engine. … read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
Morning Cat Man. on a smaller 3126 Cat. I need to replace
Morning Cat Man. on a smaller 3126 Cat. I need to replace the front main seal. Is there a special installer required? I have the one for the C-15 but im assuming its to large. would you have a part # … read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I have a Pete 330 w cat 3126 engine. It will start when
I have a Pete 330 w cat 3126 engine. It will start when engine inlet heater is active or ether or pop start otherwise it will not start, any ideas?… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I am working on a 1998 Gmc T7500 Truck with a V8-6.0L
I am working on a 1998 Gmc T7500 Truck with a V8-6.0L engine. Cylinder heads were removed together with pistons.I need the reassembly torque specifications for the heads and connecting rods. Thanks fo… read more
Curtis B.
Curtis B.
Technician
Associate Degree
991 satisfied customers
I have a f 750 with a cat 3126 motor. I replaced the
I have a f 750 with a cat 3126 motor. I replaced the heuipump and the sensor. Still can't get it to crank.… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC
HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC 6500. ENGINE IS A 3126, ALLASON TRANS. ENGINE RAN GREAT A FEW DAYS AGO. NOW IT WONT START. STARTS WITH STARTING FLUID, BUT WONT CONTINUE TO RU… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I am looking at a 1999 c6500 GMC truck with a CAT 3126 engine
I am looking at a 1999 c6500 GMC truck with a CAT 3126 engine (SN 7a531378). Are there any known problems with this engine? Currently the engine has 86,000 miles.… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
i have cat 3126 and im getting check engine light and protect
i have cat 3126 and im getting check engine light and protect engine and my truck turn off… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
Cat 3126 with 10 speed automatic. Good combo in a FL-70 with
Cat 3126 with 10 speed automatic. Good combo in a FL-70 with a 12' Toter home body? will be pulling a 36' fifth wheel trailer weighing about 15k behind it. Heading from east coast to yellowstone, down… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I have a 97 freightliner with a 3126 cat (has external high
I have a 97 freightliner with a 3126 cat (has external high pressure feed injectors).No start.… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
I HAVE A 2000 FREIGHTLINER WITH A 3126 CAT ENGINE-NO START
I HAVE A 2000 FREIGHTLINER WITH A 3126 CAT ENGINE-NO START CONDITION,CRANKS BUT WILL NOT STAY RUNNING,DIAG METHOD FOR HIGH PRESSURE OIL CIRCUIT.TRUCK CUT OFF WHILE DRIVING DOWN HIGHWAY.… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
i have a 2003 fl80 with a 3126 cat motor serial no. ckm 55015
i have a 2003 fl80 with a 3126 cat motor serial no. ckm 55015 motor droped a valve going to replace found a 2000 gmc with a 3126 cat serial no. 8yl83373 mine is a 250 hp 3126e the other a 3126b it is … read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
Hi Cat Man, I am a used Cat Engine dealer, I get about 100
Hi Cat Man, I am a used Cat Engine dealer, I get about 100 calls a week for used Cat and other Diesel engines. Problem I find is that some of the calls are for Machine Engines and I mostly stock Truck… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
My 3126 Cat will not start. It was 4 below zero with a block
My 3126 Cat will not start. It was 4 below zero with a block heater.. it would fire on 1 or 2 cylinders but not start.. pulled it inside heated shop put heat on it changed fuel filters still will not … read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
3126 cat need to ck compression need tool # XXXXX you help. 2000
3126 cat need to ck compression need tool # XXXXX you help. 2000 model gmc 3126 installed new and reprogramed computor ,got rid of injector short codes and then replaced all six injectors still no sta… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
hello. i am looking to buy a moving truck. 24/26 ft under
hello. i am looking to buy a moving truck. 24/26 ft under 26k gvw. around 150,000 miles. My options are: intl with 466 engine or FTL with a cat engine (both with 210-225 hp) any recommendations?… read more
Cat Man
Cat Man
Cat Engine Expert
9,557 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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